Battery Isolators

Keep multiple marine battery banks properly charged and electrically separated with Mastervolt Battery Isolators. Designed for onboard 12V and 24V electrical systems, Mastervolt battery isolators distribute charging current from an alternator or battery charger to two or more battery banks while allowing the batteries to operate independently. Whether you are maintaining a starting battery, house battery, electronics battery, or multiple onboard battery banks, Mastervolt offers battery management solutions designed for demanding marine electrical systems.

Mastervolt BI Battery Isolators

Mastervolt BI Battery Isolators use conventional diode technology to divide charging current between two or three battery outlets. These solid-state isolators are compact, durable, and designed for marine installations where dependable battery separation and charging are essential.

Built for Marine Battery Management

Mastervolt battery isolators feature solid-state construction and corrosion-resistant materials with aluminum heat sinks. Their compact designs and secure bolt connections make them suitable for a wide range of marine battery-management installations. When replacing a battery isolator, verify your system voltage, number of battery banks, alternator output, charger output, and required battery outlets before ordering. Selecting the correct amperage rating is essential for proper operation.